Changes with Gentics CMS OSS 6.6.0

Date: 18.09.2026


Manual Change

The Velocity rendering engine has been removed from the CMS. Constructs using one of the part types

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  • Velocity
  • Breadcrumb
  • Navigation

must be migrated to using Handlebars before updating the CMS.
If the migration from Velocity to Handlebars cannot be completed in advance, Velocity can be added back as a custom component. Please contact our Sales team at sales@gentics.com to discuss this option.


Optional Manual Change

The REST API Endpoints /diff/html and /diff/source will now use Handlebars instead of

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Velocity to render the diff. If requests are made using custom templates, they must be converted to Handlebars templates.


Optional Manual Change

Auth: The authentication mechanism for the REST API has been modified to no longer

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require the sid as query parameter. Client implementations that use the sid should be updated accordingly.


Enhancement GPU-2187 Link to this entry

A new content field type, `JSON`, has been introduced, offering support for storing and navigation on a JSON object/array content.


Enhancement GPU-2602 Link to this entry

Gentics CMS is now tested against MariaDB 12.3 automatically


Enhancement GPU-2205 Link to this entry

The new Groovy Part Type allows to add business logic for rendering in constructs. See Implementation of Groovy Scripts for details.


Enhancement GPU-2603 Link to this entry

Auth: It is now possible to create API Tokens with name and optional expiry date for the current user.


Bugfix SUP-19935 Link to this entry

Editor User Interface: In some occurrences of referencing a master node item from a channel page, the repository browser pointing to the item fails to resolve its environment. This has been fixed.


Bugfix SUP-27013 Link to this entry

Administrator User Interface: Added back the missing “create user” button in the user module.


Bugfix SUP-20161 Link to this entry

Administrator User Interface: Resolved date picker not showing the calendar


Bugfix SUP-20178 Link to this entry

Administrator User Interface: The Elasticsearch field of Mesh schemas now opens with multiple lines and scrolls instead of clipping large JSON values.


Bugfix SUP-20229 Link to this entry

When a handlebars or velocity part of a tag was rendered directly, cms.tag could not be resolved in the scope of the part. This has been fixed.


This Gentics CMS OSS version includes the Aloha Editor 2.1.20 – 28.08.2026